Collapsible trestle



' G. TOMLINSON COLLAPSIBLE TRES'iLE Filgd Nov. 16, 1922 Patented Get. 16, 1 9 23.

' UGEORGE tr'olvrnritsonaor earnnrrn; lvrrssonr tifj oornarsrsnn gg i Application filed November 16,1922. serial-n6. 601,333

To all whom/it may concern:

1 Be it known that I,-

Y which thefollowing is a speci'ficatiomJ drawings, wherein is shown an embodiment characters ZThis"invention relatesfl to a collapsible it'restle, designed primarily tor use'as a brick 'layers scafi'old, but it is to be understood that a trestle in accordance with this invencan beemployed for various other purposes, and the invention has for its'objectto provide in a manner as hereinafter referred to, a trestle construction which can be readily eitiended to supporting position; and v quick ly collapsed when occasionso requires.

F urther objects of the invention are to -endmem 8 j The upper ends, of the. standard 1, are

View the invention consists in'the novelconstructlon, arrangement and comblnation of,

parts as hereinafter more specifically described, and illustrated in the accompanying of the invention, but it isto be understood that changes, variations and modifications can be resorted to, which fall'within the scope of the claim hereunto appended.

In the drawings wherein like reference denote corresponding parts throughout the several views Figure 1 is a side elevation of a trestle in accordance with this invention, partly in section. g

Fig. 2 is an end elevation, tion. I

Fig. 3 is a side elevation with the trestle collapsed.

Fig.4; is a sectional plan offthe head member.

Referring to the'drawings in detail, a trestle in accordance with this invention,

partly in seccomprises two pair of inclined standards. 1,

2, and with the standards of each pair inclining inwardly .towardytheir upperend and to the outer side edges of each pair of standards is secured a horizontal brace member 3, the latter is arranged between: the center and the. lower ends of the pair of standards, and the said brace member .3 has; s ends secured, 'bylbolts 4, toi the standards Extended from upper ends. ofone pair of standards to thecupperr ends. ofjthe other pair} ofistandards, is a skeleton head member f 'having'uita-c' ends; arranged}, between and; hinged Z to "the upper ends of the; standards. Thehead member. consists of apair of parallel .s'ide' bars 5, 16, each, ;formedp.wi.th.ran

opening 7,, at each end thereof and-thelsaid f by; an integral transversely extendinglicom lelism with the bars;5;,'6i

bars 6,5, are; connected together medially;-

Formed integral with the -flower edges of;

the; bars 5, 16,; atyeach :end thereof, is a fiat hinged to one end of the bar 5, as at '11 and the upper end ofthe standard2 is hinged to I one end of the bar 6, as at 12.. By the hing ing, of the standards 1, 2, in the manner as stated, when the trestle is collapsed, one pair of standards can be moved ,over the head member and theotherfpair ofstandards can be swung upwardly towards the head mem ber,'as clearly shown in Fig. 3.

Associated with each pair ofstandards andwith the head member, is a brace element, which is of'inverted T-shape, and.- it

which consists of a base 13, provided with pintles 1 1, which are journaled in thelstandards .1, 2, the base 13 being positioned .be-

tween the standards 1,2, above the brace member 3. .For'med integral with and pro-. jecting from the base 13,'is a stem '15,"having its freeend formed with an extension 16 and which is disposed atan angle with re spect to the stem 15 and formed withian,

opening 17 1 When the trestle is extended, the exten i sions 16 are positioned at'opposite sides of the couplingbar 8, and the opening '17, formed in the extensions 16, are arranged to'register with the opening 9 in the coupling bar 8. Extended through the open.

in s 9 and 17 is a removable fastener eleas means for bracing the standards; and further for sustaining them in'an upright posi- 'tion when 'the trestle is extended.

When the fastener-element 18'is removed 5 from the coupling bar 8 and extension 16,

the brace elements can be shifted in the" direction as indicated by the dotteddines, and one of the brace elements and that pair of standards to which it is attached can be folded over the head 'member and-the other brace element and the standards to whichit is attached, can befolded' against. the head member whereby the trestle will. be. inl a compact positionas illustrated in- Fig. 3.

'From the foregoing description, in connection with the drawings, a collapsible cone 'struetion oftrestleis set up, which canbe' conveniently extended and folded when occasipn I so requires, and although the preferred embodiment of the invention is as is illustrated',yet itisto be understood that changesin the details of construction. can

. behad without'departingirom the spiritof.

the invention as claimed.

What'I claimis A collapsible trestle comprising a rectangular skeleton head member provided meture hereto.

thereof with a transverselyv extendingcoupling bar formed with a transversely extending opening, two pair of standards,

journaledin a pairpf-said standards, said shank extending inwardly and upwardly from. said e med a ly he eo an PI videdwith an angnlarextension capable'of b in arr nged. m a y. 0f Qne. ide of the ,col'lp lingv bar-When the trestle is extended and formed with the openings registering withieone end. ofthe opening in the coupling bar, and means commonto saidextensions and said coupllng bar and extending through said. registering openings "for detachably connecting theextensions to the coupling bar. i

In testimony whereof, I affix my signa- GEORGE. TOMLINJSJON. 

